Rotary pump



Dec. 20, 1932. E. CASKEY 1,891,302

ROTARY PUMP Filed Jan. 21, 1951 2 Sheetq-Sheet 1 E. CASKEY ROTARY PUMP Dec; 20, 1932.

2 Sheets-Sheet 2 Filed Jan. 21, 1951 Patented Dec. 20, 1932 UNITED STATES EMMETT CASKEY, OF COUNCIL BLUFFS, IOWA ROTARY PUMP Application filed January 21, 1931. Serial No. 510,263.

The invention relates to rotary pumps, and has for its object to provide a device of this character comprising a casing having a rotor within the casing in which are slid- 5 ably mounted vanes having rod connections, and which vanes engage the inner periphery of the casing and means whereby said vanes during the rotation of the rotor will suck fluid into the chamber of the casing tangentially at one side thereof, and tangentially discharge the fluid from the chamber at the other side of the casing.

A further object is to provide the opposite sides of the rotor with removable rings overlying the sides of the slidable vanes, said rings being rotatably mounted in auxiliary chambers of the casing sections and to one of which rings is attached a drive shaft carrying disc having packing engagement with its auxiliary chamber whereby leakage is prevented from the main chamber of the casing.

A further object is to provide the inner sides of the removable retaining ring with recesses, into which the opposite sides of the vanes slide, thereby allowing a relatively compact structure.

A further object is to provide the casing sections with interengaged channel and rib connection for preventing leakage.

WVith the above and other objects in view the invention resides in the combination and arrangement of parts as hereinafter set forth, shown in the drawings, described and claimed, it being understood that changes in the precise embodiment of the invention may be made within the scope of what is claimed without departing from the spirit of the invention.

In the drawings:

* Figure 1 is a view in elevation of the drive pulley side of the pump.

Figure 2 is a vertical transverse sectional view through the pump.

Figure 3 is a view in elevation of the pump with one of the casing sections removed, showing the rotor in elevation.

Figure 4 is a view in elevation of the inner side of the casing section which has been removed from the device as shown in Figure 3. Figure 5 is a detail view of a portion of the outer wall of the cylinder chamber, showing barred ports in the casing section, over which the vanes slide during the rotation of the rotor.

Referring to the drawings, the numeral 1 deslgnates the sidesupporting brackets for the pump, the upper ends of whichare provided with sleeves in which the rotary pump is supported. The rotary pump comprises a casing formed from sections 2 and 3 having an annular chamber 4 therein, in which is rotatably and eccentrically disposed a rotor 5. The rotor 5 is annular shaped and has a transverse chamber 6 and radial recesses 7 in which are slidably mounted the vanes 8, said vanes being provided with packing members 9 for preventing fluid leakage during the pumping operation. It will benoted that the upper side of the r0- tor is relatively close to the wall of the chamber 4, and the sliding vanes 8 are connected together by rods 10, which extend through the chamber 6, therefore it will be seen that during the rotation of the rotor the vanes 8 will move inwardly and outwardly, sucking fluid through the intake port 11, and discharging the same through the discharge port 12. It will be noted that the chamber 4 as Well as the ports 11 and 12 are formed by the casing sections 2 and 3, that is one half of said chamber and ports are in the casing sections, and are formed as complete elements when the casing sections are brought together. To form a leak proof connectionbetween the casing sections, one of 8 said sections is provided with an annular rib 13 and the other section with an annular channel 14, and the sections are connected together by means of bolts 15 and 16. It-will be noted that the bolts 16 extend through the rib 13 and channel 14 at theupper end of the casing.

Secured to opposite sides of the rotor 5 by means of screws 17 are retaining rings 18, and which retaining rings are provided with slots 19 in their inner faces in registration with the recesses 7 therefore it will be seen that during the radial movement of the vanes 8, they will move into the recesses 19, and by this particular construction the recesses 7 can be transversely cut for the reception of the vanes, and the rotor and its parts assembled as a unit to be received within the casing. The inner sides of the casing sections 2 and 3 are provided with auxiliary chambers 20 and 21 forming bearings for the rings 18, which additionally support the rotor,and insure its accurate rotation eccentrically in relation to the axis of the casing chamber 4. Secured to one of the rings 18 within the auxiliary chamber 20 is a bearing disc 22 having packing rings 23 for preventing leakage of fluid during the rapid rotation of the device under the intaking and discharge pressures. Disc 22 is provided with a boss 24 having a drive shaft 28, which extends through the sleeve 29 carried by the casing section 2, and mounted in the sleeve 30 carried by the upper end of the bracket 1. If so desired an antifrictional bearing 31 may be placed within the sleeve 29 for additionally preventing friction. Shaft 28 is provided with a drive pulley 32, over which a belt may be placed leading to any suitable source of power.

The other side of the casing is supported by means of an integral shaft 33 mounted in the other bracket 1 in any suitable manner, however for purposes of illustration set screws 34; are shown.

Referring to Figure 5,; it will be noted that the casing sections 2 and 3 are provided with integral arcuate bars 35 over the ports 11 and 12, and over which the slidable vanes pass and are guided during the rotation of the rotor, therefore it will be seen that they will not catch in the intake and discharge ports. Half of one of the bars is formed integral with each casing section 2 and 3 and indicated by the numeral 36, therefore it will be seen that the central bar is formed by both sections 2 and 3 when said sections are brought together, consequently the danger of the vanes chipp ng the edges of the ports, both intake and discharge, during the rotation of the rotor is reduced to a minimum.

From the above it will be seen that a rotary pump is provided, which is simple in construction, positive in its operation, and one wherein the parts have been reduced to a ininimtun, thereby allowing the device to be cheaply manufactured and sold.

'The invention having been set forth what is claimed as new and useful is A rotary pump comprising a casing, an eccentrically mounted rotor within said casing, slidable vanes carried by the rotor and movable diametrically through the rotor by engagement with the wall of an eccentric chamber in the casing, said casing being formed from registering sections having auxiliary chambers in communication with the chamber of the casing at opposite sides thereof, rings of greater diameter than the his signature.

EMMETT CASKEY. 

